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25-09-2021 Electromagnetic Theory

Q. The expression for refractive index is given by

A. N = v/c
B. N = c/v
C. N = cv
D. N = 1/cv


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Dapzoi Verified
Commented on 2021-09-25 11:04:49 (IST)
Answer: B

Explanation: The refractive index is defined as the ratio of the velocity of light in a vacuum to its velocity in a specified medium. It is given by n = c/v. It is constant for a particular material.